WebSVN – HelenOS – Diff – /tags/0.2.0/kernel/arch/ia32/src/drivers/ega.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch/drivers/ega.h>
#include <putchar.h>
#include <mm/page.h>
#include <mm/as.h>
#include <arch/mm/page.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <memstr.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
SPINLOCK_INITIALIZE(egalock);
static __u32 ega_cursor;
static __u8 *videoram;
 
static void ega_putchar(chardev_t *d, const char ch);
 
chardev_t ega_console;
static chardev_operations_t ega_ops = {
    .write = ega_putchar
};
 
void ega_move_cursor(void);
 
void ega_init(void)
{
    __u8 hi, lo;
   
    videoram = (__u8 *) hw_map(VIDEORAM, SCREEN * 2);
    outb(0x3d4, 0xe);
    hi = inb(0x3d5);
    outb(0x3d4, 0xf);
    lo = inb(0x3d5);
    ega_cursor = (hi << 8) | lo;
 
    chardev_initialize("ega_out", &ega_console, &ega_ops);
    stdout = &ega_console;
   
    sysinfo_set_item_val("fb", NULL, true);
    sysinfo_set_item_val("fb.kind", NULL, 2);
    sysinfo_set_item_val("fb.width", NULL, ROW);
    sysinfo_set_item_val("fb.height", NULL, ROWS);
    sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
   
#ifndef CONFIG_FB
    putchar('\n');
#endif  
}
 
static void ega_display_char(char ch)
{
    videoram[ega_cursor * 2] = ch;
}
 
/*
 * This function takes care of scrolling.
 */
static void ega_check_cursor(void)
{
    if (ega_cursor < SCREEN)
        return;
 
    memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
    memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);
    ega_cursor = ega_cursor - ROW;
}
 
void ega_putchar(chardev_t *d, const char ch)
{
    ipl_t ipl;
 
    ipl = interrupts_disable();
    spinlock_lock(&egalock);
 
    switch (ch) {
        case '\n':
            ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
            break;
        case '\t':
            ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
            break;
        case '\b':
            if (ega_cursor % ROW)
                ega_cursor--;
            break;
        default:
            ega_display_char(ch);
            ega_cursor++;
            break;
    }
    ega_check_cursor();
    ega_move_cursor();
 
    spinlock_unlock(&egalock);
    interrupts_restore(ipl);
}
 
void ega_move_cursor(void)
{
    outb(0x3d4, 0xe);
    outb(0x3d5, (ega_cursor >> 8) & 0xff);
    outb(0x3d4, 0xf);
    outb(0x3d5, ega_cursor & 0xff);
}
 

Rev 1964	Rev 1968
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <arch/drivers/ega.h>	29	#include <arch/drivers/ega.h>
30	#include <putchar.h>	30	#include <putchar.h>
31	#include <mm/page.h>	31	#include <mm/page.h>
32	#include <mm/as.h>	32	#include <mm/as.h>
33	#include <arch/mm/page.h>	33	#include <arch/mm/page.h>
34	#include <synch/spinlock.h>	34	#include <synch/spinlock.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <arch/asm.h>	36	#include <arch/asm.h>
37	#include <memstr.h>	37	#include <memstr.h>
38	#include <console/chardev.h>	38	#include <console/chardev.h>
39	#include <console/console.h>	39	#include <console/console.h>
40	#include <sysinfo/sysinfo.h>	40	#include <sysinfo/sysinfo.h>
41		41
42	/*	42	/*
43	* The EGA driver.	43	* The EGA driver.
44	* Simple and short. Function for displaying characters and "scrolling".	44	* Simple and short. Function for displaying characters and "scrolling".
45	*/	45	*/
46		46
47	SPINLOCK_INITIALIZE(egalock);	47	SPINLOCK_INITIALIZE(egalock);
48	static __u32 ega_cursor;	48	static __u32 ega_cursor;
49	static __u8 *videoram;	49	static __u8 *videoram;
50		50
51	static void ega_putchar(chardev_t *d, const char ch);	51	static void ega_putchar(chardev_t *d, const char ch);
52		52
53	chardev_t ega_console;	53	chardev_t ega_console;
54	static chardev_operations_t ega_ops = {	54	static chardev_operations_t ega_ops = {
55	.write = ega_putchar	55	.write = ega_putchar
56	};	56	};
57		57
58	void ega_move_cursor(void);	58	void ega_move_cursor(void);
59		59
60	void ega_init(void)	60	void ega_init(void)
61	{	61	{
62	__u8 hi, lo;	62	__u8 hi, lo;
63		63
64	videoram = (__u8 ) hw_map(VIDEORAM, SCREEN 2);	64	videoram = (__u8 ) hw_map(VIDEORAM, SCREEN 2);
65	outb(0x3d4, 0xe);	65	outb(0x3d4, 0xe);
66	hi = inb(0x3d5);	66	hi = inb(0x3d5);
67	outb(0x3d4, 0xf);	67	outb(0x3d4, 0xf);
68	lo = inb(0x3d5);	68	lo = inb(0x3d5);
69	ega_cursor = (hi << 8) \| lo;	69	ega_cursor = (hi << 8) \| lo;
70		70
71	chardev_initialize("ega_out", &ega_console, &ega_ops);	71	chardev_initialize("ega_out", &ega_console, &ega_ops);
72	stdout = &ega_console;	72	stdout = &ega_console;
73		73
74	sysinfo_set_item_val("fb", NULL, true);	74	sysinfo_set_item_val("fb", NULL, true);
75	sysinfo_set_item_val("fb.kind", NULL, 2);	75	sysinfo_set_item_val("fb.kind", NULL, 2);
76	sysinfo_set_item_val("fb.width", NULL, ROW);	76	sysinfo_set_item_val("fb.width", NULL, ROW);
77	sysinfo_set_item_val("fb.height", NULL, ROWS);	77	sysinfo_set_item_val("fb.height", NULL, ROWS);
78	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);	78	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
79		79
80	#ifndef CONFIG_FB	80	#ifndef CONFIG_FB
81	putchar('\n');	81	putchar('\n');
82	#endif	82	#endif
83	}	83	}
84		84
85	static void ega_display_char(char ch)	85	static void ega_display_char(char ch)
86	{	86	{
87	videoram[ega_cursor * 2] = ch;	87	videoram[ega_cursor * 2] = ch;
88	}	88	}
89		89
90	/*	90	/*
91	* This function takes care of scrolling.	91	* This function takes care of scrolling.
92	*/	92	*/
93	static void ega_check_cursor(void)	93	static void ega_check_cursor(void)
94	{	94	{
95	if (ega_cursor < SCREEN)	95	if (ega_cursor < SCREEN)
96	return;	96	return;
97		97
98	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);	98	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);
99	memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);	99	memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);
100	ega_cursor = ega_cursor - ROW;	100	ega_cursor = ega_cursor - ROW;
101	}	101	}
102		102
103	void ega_putchar(chardev_t *d, const char ch)	103	void ega_putchar(chardev_t *d, const char ch)
104	{	104	{
105	ipl_t ipl;	105	ipl_t ipl;
106		106
107	ipl = interrupts_disable();	107	ipl = interrupts_disable();
108	spinlock_lock(&egalock);	108	spinlock_lock(&egalock);
109		109
110	switch (ch) {	110	switch (ch) {
111	case '\n':	111	case '\n':
112	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	112	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
113	break;	113	break;
114	case '\t':	114	case '\t':
115	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	115	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
116	break;	116	break;
117	case '\b':	117	case '\b':
118	if (ega_cursor % ROW)	118	if (ega_cursor % ROW)
119	ega_cursor--;	119	ega_cursor--;
120	break;	120	break;
121	default:	121	default:
122	ega_display_char(ch);	122	ega_display_char(ch);
123	ega_cursor++;	123	ega_cursor++;
124	break;	124	break;
125	}	125	}
126	ega_check_cursor();	126	ega_check_cursor();
127	ega_move_cursor();	127	ega_move_cursor();
128		128
129	spinlock_unlock(&egalock);	129	spinlock_unlock(&egalock);
130	interrupts_restore(ipl);	130	interrupts_restore(ipl);
131	}	131	}
132		132
133	void ega_move_cursor(void)	133	void ega_move_cursor(void)
134	{	134	{
135	outb(0x3d4, 0xe);	135	outb(0x3d4, 0xe);
136	outb(0x3d5, (ega_cursor >> 8) & 0xff);	136	outb(0x3d5, (ega_cursor >> 8) & 0xff);
137	outb(0x3d4, 0xf);	137	outb(0x3d4, 0xf);
138	outb(0x3d5, ega_cursor & 0xff);	138	outb(0x3d5, ega_cursor & 0xff);
139	}	139	}
140		140

Subversion Repositories HelenOS

(root)/tags/0.2.0/kernel/arch/ia32/src/drivers/ega.c – Rev 1964 → 1968